@tool
extends EditorProperty

var open_button: Button
var dialog: ConfirmationDialog
var draft: CabinetPCBConfig
var chosen := "J1"
var buttons: Dictionary = {}
var type_select: OptionButton
var input_pull: CheckBox
var device_name: LineEdit
var device_id: LineEdit
var binding: LineEdit
var notes: TextEdit
var pin_label: Label
var warning_label: Label
var summary: Label
var loading := false

func _init() -> void:
	open_button = Button.new()
	open_button.text = "Open PCB connections..."
	open_button.pressed.connect(_open)
	add_child(open_button)
	add_focusable(open_button)

func _update_property() -> void:
	var config: CabinetPCBConfig = get_edited_object().get(get_edited_property())
	open_button.text = "PCB connections (%d)..." % config.connections.size() if config else "Set up PCB connections..."

func _open() -> void:
	var source: CabinetPCBConfig = get_edited_object().get(get_edited_property())
	draft = source.duplicate(true) if source else CabinetPCBConfig.new()
	# Rebuild static labels after editor script reloads as well as dynamic fields.
	if is_instance_valid(dialog):
		dialog.hide()
		dialog.queue_free()
	buttons.clear()
	_build_dialog()
	dialog.title = "%s - Custom GPIO routing PCB" % get_edited_object().display_name
	_select(chosen)
	dialog.popup_centered_clamped(Vector2i(1120, 760), 0.9)

func _label(text: String, parent: Node) -> Label:
	var label := Label.new()
	label.text = text
	label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	parent.add_child(label)
	return label

func _build_dialog() -> void:
	dialog = ConfirmationDialog.new()
	dialog.ok_button_text = "Apply connections"
	dialog.min_size = Vector2i(700, 550)
	dialog.confirmed.connect(_apply)
	add_child(dialog)
	var scroll := ScrollContainer.new()
	dialog.add_child(scroll)
	var content := VBoxContainer.new()
	content.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	scroll.add_child(content)
	_label("Select a socket, then describe the device. Apply supports Undo/Redo; save the cabinet resource to keep changes.", content)
	var panel := PanelContainer.new()
	var style := StyleBoxFlat.new()
	style.bg_color = Color("164d3a")
	style.content_margin_left = 16
	style.content_margin_right = 16
	style.content_margin_top = 16
	style.content_margin_bottom = 16
	panel.add_theme_stylebox_override("panel", style)
	content.add_child(panel)
	var board := VBoxContainer.new()
	board.add_theme_constant_override("separation", 18)
	panel.add_child(board)
	var header := Button.new()
	header.text = "J9 | Raspberry Pi GPIO ribbon | verify pin 1 orientation"
	header.disabled = true
	board.add_child(header)
	var middle := HBoxContainer.new()
	board.add_child(middle)
	var group_index := 0
	for group in [["J15", "J14", "J13", "J12", "J11", "J10"], ["J22", "J21", "J20", "J19", "J18", "J17"], ["J16"]]:
		var column := VBoxContainer.new()
		column.size_flags_horizontal = Control.SIZE_EXPAND_FILL
		middle.add_child(column)
		_label(["SIGNAL + 3V3", "SIGNAL / GND", "I2C"][group_index], column)
		group_index += 1
		var grid := GridContainer.new()
		grid.columns = group.size()
		grid.size_flags_horizontal = Control.SIZE_EXPAND_FILL
		column.add_child(grid)
		for id in group:
			_port_button(id, grid)
	_label("READER CONNECTORS | selector BCM22 / BCM27 / BCM17 | shared reset BCM20", board)
	var readers := GridContainer.new()
	readers.columns = 8
	board.add_child(readers)
	for index in range(1, 9):
		_port_button("J%d" % index, readers)
	summary = _label("", content)
	var details := HBoxContainer.new()
	details.add_theme_constant_override("separation", 24)
	content.add_child(details)
	var left := VBoxContainer.new()
	left.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	details.add_child(left)
	pin_label = _label("", left)
	_label("GPIO is a control signal. Motors, relays and lighting need an appropriate driver and supply. This editor does not write GPIO or install reader drivers.", left)
	var form := VBoxContainer.new()
	form.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	details.add_child(form)
	_label("Connected device", form)
	type_select = OptionButton.new()
	type_select.item_selected.connect(_type_changed)
	form.add_child(type_select)
	input_pull = CheckBox.new()
	input_pull.text = "Input pull-up (active when connected to GND)"
	input_pull.toggled.connect(func(_value: bool): _store())
	form.add_child(input_pull)
	device_name = _field("Device name", form)
	device_id = _field("Unique device ID (within this cabinet)", form)
	binding = _field("Hardware action ID (outputs) / event ID (inputs)", form)
	_label("Wiring notes / driver / supply / I2C address", form)
	notes = TextEdit.new()
	notes.custom_minimum_size.y = 80
	notes.text_changed.connect(_store)
	form.add_child(notes)
	warning_label = _label("", content)
	warning_label.modulate = Color("ffd07a")

func _field(title: String, parent: Node) -> LineEdit:
	_label(title, parent)
	var field := LineEdit.new()
	field.text_changed.connect(func(_text: String): _store())
	parent.add_child(field)
	return field

func _port_button(id: String, parent: Node) -> void:
	var button := Button.new()
	button.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	button.custom_minimum_size = Vector2(64, 82)
	button.toggle_mode = true
	button.pressed.connect(_select.bind(id))
	parent.add_child(button)
	buttons[id] = button

func _select(id: String) -> void:
	chosen = id
	loading = true
	var definition := CabinetPCBConfig.port(id)
	var item := draft.connection(id)
	pin_label.text = "%s | %s\n\n%s" % [id, definition.label, definition.pins]
	type_select.clear()
	type_select.add_item("Empty / unplugged")
	type_select.set_item_metadata(0, "")
	for kind in definition.types:
		type_select.add_item(CabinetPCBConfig.TYPES[kind])
		type_select.set_item_metadata(type_select.item_count - 1, kind)
	type_select.select(0)
	if item:
		for index in range(type_select.item_count):
			if type_select.get_item_metadata(index) == item.device_type:
				type_select.select(index)
	device_name.text = item.display_name if item else ""
	device_id.text = item.device_id if item else ""
	binding.text = item.binding_id if item else ""
	notes.text = item.notes if item else ""
	input_pull.set_pressed_no_signal(item.input_pull_up if item else true)
	loading = false
	_refresh_board()

func _type_changed(_index: int) -> void:
	_store()

func _store() -> void:
	if loading:
		return
	var item := PCBConnection.new()
	item.port_id = chosen
	item.device_type = str(type_select.get_selected_metadata())
	item.display_name = device_name.text.strip_edges()
	item.device_id = device_id.text.strip_edges()
	item.binding_id = binding.text.strip_edges()
	item.notes = notes.text
	item.input_pull_up = input_pull.button_pressed
	draft.set_connection(item)
	_refresh_board()

func _refresh_board() -> void:
	for id in buttons:
		var definition := CabinetPCBConfig.port(id)
		var item := draft.connection(id)
		var button: Button = buttons[id]
		button.text = "%s\n%s\n%s" % [id, definition.label, item.device_type.to_upper() if item else "Empty"]
		button.set_pressed_no_signal(id == chosen)
		button.tooltip_text = "%s\n%s" % [definition.pins, item.display_name if item else "Unassigned"]
	var disabled := str(type_select.get_selected_metadata()).is_empty()
	device_name.editable = not disabled
	device_id.editable = not disabled
	binding.editable = not disabled
	notes.editable = not disabled
	input_pull.visible = str(type_select.get_selected_metadata()) in ["button", "sensor"]
	summary.text = "%d connections configured | %s selected" % [draft.connections.size(), chosen]
	var issues := draft.issues(get_edited_object().hardware_config)
	warning_label.text = "Review wiring:\n- " + "\n- ".join(issues) if not issues.is_empty() else "Inventory is consistent. Runtime wiring and drivers are configured separately."

func _apply() -> void:
	emit_changed(get_edited_property(), draft.duplicate(true))
	_update_property()